Monitoring volcano activity is an important issue in the mitigation of natural hazards. Recently, most fatal issues occurred on volcanoes with low-energy and moderate activity, making them attractive touristic places (e.g., the 2014 Mount Ontake eruption in Japan). For these types of volcanoes, monitoring involves multiphysics measurements on dense networks. Distributed networks of sensors must be easily adapted to the volcano’s evolving state and the appearance of new active areas like fumaroles or high heat flux in the soil.
The team at Geosciences Rennes, a joint mixed research unit between the University of Rennes and the CNRS (UMR-6118), has been conducting monitoring experiments on the volcano La Grande Soufrière over the last 15 years. La Grande Soufrière is located in Guadeloupe, a French overseas region located in the southern Caribbean Sea.
In response to the volcano regaining activity since 2014, the Géosciences laboratory decided to increase their monitoring capacity on the top of the lava dome by deploying a network of sensors (e.g., Pt100 in fumaroles, 1D and 3D seismic geophones, thermocouples in the soil, pressure sensor and Pt100 in the boiling acid lake). The team’s previous positive experience with the Gantner Instruments’ e.series (e.reader, e.pac, and e.bloxx) led them to retain the Q.series to develop their new acquisition network.